Note: Except where . This poses a risk of electrocution not just to the worker holding the tool, but to everyone who contacts the scaffold. When poles are made of wood, the pole lumber shall be straight-grained, free of shakes, large loose or dead knots, and other defects which might impair strength. Free access to premium services like Tuneln, Mubi and more. When platforms are being moved to the next level, the existing platform shall be left undisturbed until the new bearers have been set in place and braced, prior to receiving the new platforms. If bridges are not used, passage may be made from one platform to another only when the platforms are at the same height and are abutting. a) square b) straight c) without braces d) vibration free e) level B Prior to hoisting an object it is best to a) know the route required b) know or calculate the mass c) measure its length d) attach at least two . Move the scaffold into your desired position, and make sure it is level and secure. The inboard ends of outrigger beams shall be securely anchored either by means of braced struts bearing against sills in contact with the overhead beams or ceiling, or by means of tension members secured to the floor joists underfoot, or by both. Instant access to millions of ebooks, audiobooks, magazines, podcasts and more. Scaffolds shall be constructed in accordance with paragraphs (a), (b), or (c) of this section, as appropriate. Supports for platforms shall be attached directly to the support stirrup and not to any other platform. 7. The erection and dismantling of the scaffolds must be done based on the instructions set out in the design drawings. Always use . The entire supporting structure shall be securely braced to prevent any horizontal movement. Guardrails should be between 38" and 45" high. Name the three types of scaffolds and describe their main characteristics A scaffold is a temporary structure specifically erected to support access or working platforms. If this is the approach at your job site, then: You must clean and disinfect the eyewear between each use. D. Stop using the tool, A. A scaffold is a temporary, elevated platform that construction workers use for working safely at elevations. Platforms shall be secured to the brackets in a manner that will prevent the separation of the platforms from the brackets and the movement of the platforms or the brackets on a completed scaffold. ERECTED SCAFFOLDS SHOULD BE CONTINUALLY INSPECTED by users to be sure that they are maintained in safe condition. Why? There are many other scaffolds in use as well, each with advantages and Damaged or deteriorated equipment must not be used USA (v. 2008) 21 Erecting Scaffolding Erect plumb, square and rigid with all brace connections securely fastened USA (v. 2008) 22 Tubular Welded-frame Scaffolds Be sure scaffold stays plumb and level as erection progresses For mobile scaffolds, use a horizontal diagonal brace, for OSHA MODULE 5 Scaffolds Because of this, the following is required: A certified crane operator must be used. PLUMB/LEVEL/SQUARE. . "Footings shall be level, sound, rigid, and capable of supporting the loaded scaffold without settling or displacement." 1926.451 (c) (2) (i) True or False: Only personnel instructed in the requirements of the standard and the task to be performed along with their tools, equipment and materials needed for the job are allowed on the platform. A narrow excavation made below the surface of the ground in which the depth is greater than the width with the width not to exceed 15 feet Additional requirements applicable to specific types of scaffolds. Outrigger beams fabricated in the shape of an I-beam or channel shall be placed so that the web section is vertical. Each pump jack bracket shall have two positive gripping mechanisms to prevent any failure or slippage. Scaffolds are fabricated from many materialssome common, and others not so (Do not use insulating Styrofoam cups.) Select the equipment you need and place it near the work area. OSHA 1926.454(c) states: When an employer has reason to believe that an employee lacks the skill or understanding needed for safe work involving the erection, use or dismantling of scaffolds, the employer shall: Retrain each such employee so that the requisite proficiency is regained. Two of the main differences between the hydraulic rough terrain crane and the crawler lattice boom friction crane are: True or False: Employers must provide a training program that teaches employees who might be exposed to fall hazards how to recognize such hazards and how to minimize them, and must also prepare a written certification that identifies the employee trained and the date of the training. Correct answer Special care and training incentives Keep Vehicles and Heavy Equipment Clear. 1. Scaffolds, once properly erected, are a control measure to prevent the risk of persons and objects falling when working at height. (b) Tube and Coupler Scaffolds. Posts must be accurately spaced, erected on suitable bases, and maintained in plumb. In 1996, when OSHA issued the revised Scaffold Standard Provide guards on power tools and other equipment with moving parts. (8) All ladders used for access shall conform to ladders, Article 25. C. To send every worker home whole and healthy every day Identify site specific hazards not identified in the preplanning stage. Each bearer shall be securely fastened to the platform. Do Not Try To Drive More Than______Hours In Any One Day. A good time to perform these inspections is at the start of the workday to ensure the area is clear for that day's shift. A. Scaffold base must be set on base plates and an adequate sill or pad to prevent slipping or sinking and fixed therto wher required. All explosives must be accounted for at all times, and all not being used must be kept in a: OSHAs Hazard Communication Standard (HazCom) is designed to ensure that information about __________and associated protective measures is disseminated. When horses are arranged in tiers, each tier shall be crossbraced. By the user only b. Plumb c. By a contractor d. Plumb and level e. Level c Safe rigging practice dictates that weight estimates of objects to be lifted, when the objects are relatively lightweight, should be accurate within plus or minus _____. Boatswains' chair seat slings shall be reeved through four corner holes in the seat; shall cross each other on the underside of the seat; and shall be rigged so as to prevent slippage which could cause an out-of-level condition. CapacityScaffolds and scaffold components must support at least 4 times the maximum intended load. Use of fall protection above 10 feet. The bottom runners and bearers shall be located as close to the base as possible. Hard hats must be worn by all persons erecting, moving, dismantling or using scaffolding. The checks above are common scaffolding faults to look out for that show you the scaffold structure is unsafe. Brackets (including those provided with pointed metal projections) shall be anchored in place by nails unless it is impractical to use nails. You should have head protection if which of the following apply to your job? Forklifts, trucks, similar motor vehicles or add-on motors shall not be used to propel scaffolds unless the scaffold is designed for such propulsion systems. Braces, bearers, and runners shall not be spliced between poles. Electrocution, electric shock, burns, indirect (e.g., a fall from a ladder). C. Have all brakes and locking devices set when the occupied personnel platform is in stationary position Each has (w) of appendix A to this subpart; "Stilts." All ladders used in conjunction with step, platform and trestle ladder scaffolds shall meet the pertinent requirements of subpart X of this part -- Stairways and Ladders, except that job-made ladders shall not be used to support such scaffolds. Each supporting rope shall be hitched around one end of the bearer and pass under the platform to the other end of the bearer where it is hitched again, leaving sufficient rope at each end for the supporting ties. Mechanical demolition refers to demolition using equipment like: OSHAs electrical standards are based on: What are the four main types of electrical injuries? Tube and coupler scaffolds over 125 feet in height shall be designed by a registered professional engineer, and shall be constructed and loaded in accordance with such design. All other connections of the scaffold are tight and secure; c. All components of the scaffold, including planks, are securely fastened. DO NOT ABUSE OR MISUSE THE SCAFFOLD EQUIPMENT. Scaffolding in this Guide means the individual components, for example tubes, couplers In general, head protection should do which of the following? . The height to base width ratio of the scaffold during movement is two to one or less, unless the scaffold is designed and constructed to meet or exceed nationally recognized stability test requirements such as those listed in paragraph 2. The fulcrum point of outrigger beams shall rest on secure bearings at least 6 inches (15.2 cm) in each horizontal dimension. Just a few example you can find fast on the interwebs, NFI . Other requirements are listed Scaffolds must be designed by a professional engineer in the following situations: Supported scaffolds exceeding: fifteen metres in height above their base support; or A staging area is available. The following requirements do not apply to two-point adjustable suspension scaffolds used as masons' or stonesetters' scaffolds. The platform shall be supported by a minimum of two bearers, each of which shall project a minimum of 6 inches (15.2 cm) beyond the platform on both sides. Employees working in the vicinity of a crane must take care to avoid what kind of accident? Identify the three essential elements of safe scaffold construction, and give at This means that whatever you're working on won't be tilted or sloped in any way. 4. Tap here to review the details. 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When the pump jack has to pass bracing already installed, an additional brace shall be installed approximately 4 feet (1.2 m) above the brace to be passed, and shall be left in place until the pump jack has been moved and the original brace reinstalled. Chicken Ladder. Scaffolds must be plumb, level, and squared. Supported scaffold poles, legs . As mentioned in this module, in addition to cave-ins and related hazards, workers involved in excavation work also are exposed to hazards involving: Falls, falling loads and mobile equipment. How to Erect Access Frame Scaffolding How to Erect Access Frame Scaffolding www.worksafebc.com Select . B. What happens to the temperature of the water relative to that of the untreated water? DO NOT ERECT, DISMANTLE OR ALTER A SCAFFOLD unless under the supervision of a qualified person. Nothing should lean in any direction. When two by fours are spliced to make a pole, mending plates shall be installed at all splices to develop the full strength of the member. proper measures to protect against or prevent accidents and injuries. Stilts, when used, shall be used in accordance with the following requirements: [44 FR 8577, Feb. 9, 1979; 44 FR 20940. scaffold are exposed, and describe at least one method of hazard prevention for C. Both A and B Scaffold components. Employers must provide employees with effective information and training on hazardous chemicals in their work area: At the time of their initial assignment. 1926.452 - Additional requirements applicable to specific types of scaffolds. When dismantling a scaffold, all work should be conducted: Tube and coupler scaffolds over 125 feet high must be designed by: What type of scaffold other than the tube and coupler scaffold is ideal for use around complex structures? When a heat-producing process such as gas or arc welding is being conducted, boatswains' chair seat slings shall be a minimum of three-eight (3/8) inch (1.0 cm) wire rope. Plumb and brace poles, legs, posts, frames, and uprights to prevent swaying and displacement. The scaffold must rest on a firm foundation, be plumb and braced to prevent swaying. least three examples of incorporating each of the elements. Safe access above 2 feet. Scaffolds shall be suspended only from the roof structure or other structural member such as ceiling beams. c. The Law of Conservation of Matter must be followed. Cloudflare is currently unable to resolve your requested domain. The inboard end of outrigger beams, measured from the fulcrum point to the extreme point of anchorage, shall be not less than one and one-half times the outboard end in length. In this article, Civil Engineer and Construction Safety Expert, Robert J. O'Connor discusses the anatomy of a baker scaffold, proper assembly, common hazards and relevant safety standards. Do not force frames or . Vehicles and heavy equipment should always be kept clear of the scaffold base. All planking must be Scaffold Grades, or equivalent, as recognized by approved grading rules for the species of wood used. Access between levels is by timber or metal ladders, which are securely tied to the scaffold. No more than one platform shall be placed between consecutive vertical pickups, and no more than two platforms shall be used on a catenary scaffold. We thoroughly check each answer to a question to provide you with the most correct answers. Be used only to support personnel, unless the scaffold has been designed for other loads by a qualified engineer and built to withstand the tipping forces caused by those other loads being placed on the bracket-supported section of the scaffold. 15% c. 20% d. 25% Prior to starting all demolition operations, OSHA 1926.850 (a) requires that an engineering survey of the structure be conducted by a competent person. Non-mandatory Appendix A to this subpart contains examples of criteria that will enable an employer to comply with design and loading requirements for tube and coupler scaffolds under 125 feet in height. Erecting Scaffolding Safely. Before a scaffold is moved, each employee on the scaffold shall be made aware of the move. (Hold the cups up to your cheeks to tell.) Many precautions must be taken before scaffolding work can commence. Insufficient length. Other common components are scaffold boards and edge protection. 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